Eight years, no answers on NSW man's death

That's how long Lynette Cecil has been searching for answers to how her son, Adam Cecil, died.

But two inquests, a Supreme Court battle and over $200,000 in legal fees have failed to establish exactly how the 27-year-old "popular, intelligent" young man came to be discovered unconscious beside his apartment building at Cronulla in August 2005.

Mr Cecil, who was just a few days shy of his 28th birthday, died in hospital from massive head and internal injuries.

A 2008 inquest found he had died by suicide, most likely from jumping off the roof of his apartment building.

But Lynette Cecil refused to believe it and went searching for fresh evidence.

She found it in the shape of two experts who believe it would have been impossible for Mr Cecil, who had a high level of alcohol and prescription painkillers in his system, to have jumped off the roof.

One expert noted the young man would have to have been running at 12 km/h across the tricky terrain in order to land precisely where he was found.

Ms Cecil continues to believe her son was assaulted and then thrown over a fence in the property.

She took the matter to the Supreme Court, which quashed the initial inquest finding of suicide and ordered a fresh inquest into his death.

But despite extensive investigations on the part of Deputy State Coroner Hugh Dillon - including a review by the police homicide squad into the initial police investigation - answers were not forthcoming for Ms Cecil.

In his findings handed down on Thursday, Mr Dillon found it was very unlikely Mr Cecil was assaulted with little evidence to support such a conclusion.

He also found Mr Cecil could not have fallen from the roof, but he said it was possible the young man had fallen or thrown himself from his balcony.

"In my view, while suicide remains a genuine possibility, so too does death by misadventure or accident," Mr Dillon said.

He ultimately found Mr Cecil died from multiple injuries sustained after a "fall from height".

"I am unable to determine how that fall came about," he said.

It wouldn't be the first time Mr Cecil had jumped from a balcony.

Just eight months before his death, he jumped off his balcony in an attempted suicide following a row with his girlfriend.

He later told a friend the next time he attempted suicide, he would "land on something like concrete".

Just before his death, he had broken up with his girlfriend and was "emotionally vulnerable".

A handwriting expert confirmed a will in Mr Cecil's apartment leaving all his possessions to his brother Mark - "the strongest person I know" - had been written by Mr Cecil.

Three minutes before he was discovered on the ground, a text message was sent from his phone to his estranged dad saying, "It's all your falt (sic)."

Mr Dillon extended his condolences to Mr Cecil's family, telling them he regretted that he had no further answers for them.

"I hope that they will accept that their concerns have been taken seriously, weighed and carefully considered," he said.

Speaking outside court, Ms Cecil said she was "mystified" at the outcome.

"It is disappointing after such a fight that we have no clear answers," she said.